display isis route

Function

The display isis route command displays the IS-IS routes.

Format

display isis route [ process-id | vpn-instance vpn-instance-name ] ipv6 [ verbose | [ level-1 | level-2 ] | ipv6-address [ prefix-length ] ] ^*

display isis process-id route [ ipv4 ] [ ip-address [ mask | mask-length ] | { level-1 | level-2 } | verbose ] ^*

display isis process-id route ipv6 [ ipv6-address [ prefix-length ] | { level-1 | level-2 } | verbose ] ^*

Parameters

Parameter	Description	Value
process-id	Specifies the IS-IS process ID.	The value is an integer ranging from 1 to 65535.
vpn-instance vpn-instance-name	Displays routing information about the multi-instance IS-IS process in the specified VPN instance.	The parameter vpn-instance-name is a string ranges from 1 to 31. It is case sensitive.
ipv4	Displays IPv4 routing information.	-
verbose	Displays detailed information about the IS-IS routes.	-
level-1	Displays IS-IS Level-1 routes.	-
level-2	Displays IS-IS Level-2 routes.	-
ip-address	Specifies the IP address in dotted decimal notation.	The value is in dotted decimal notation.
mask	Specifies the subnet mask in dotted decimal notation.	The value is in dotted decimal notation.
mask-length	Specifies the mask length.	The value is an integer ranging from 0 to 32.
ipv6	Displays IPv6 routing information.	-
ipv6-address	Specifies the IPv6 destination address.	The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.
prefix-length	Specifies the length of the IPv6 address prefix.	The value is an integer ranging from 0 to 128.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

If neither ipv4 nor ipv6 is specified, the router displays the IS-IS routes of both IPv6 and IPv4.

If no level is specified, the router displays both Level-1 and Level-2 routes.

Example

# Display all the IS-IS routes.

<sysname> display isis route

                         Route information for ISIS(1)
                         -----------------------------

                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

 IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
 -------------------------------------------------------------------------------
 192.168.10.0/24       20         NULL    GE0/0/1       192.168.30.2     A/-/L/-
 192.168.20.0/24       10         NULL    GE0/0/2      Direct          D/-/L/-
 
 IPV6 Dest.       ExitInterface   NextHop                      Cost      Flags
 -------------------------------------------------------------------------------
 2001:db8::/64   GE0/0/2       Direct                       10        D/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set


                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Destination    IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 192.168.20.0/24      10         NULL    GE0/0/2       Direct          D/-/L/-

 IPV6 Dest.      ExitInterface   NextHop                       Cost     Flags
-------------------------------------------------------------------------------
 2001:db8::/64   GE0/0/2       Direct                        10       D/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set

**Table 1** Description of the **display isis route** command output
Item	Description
IPV4 Destination	Indicates IPv4 destination address and mask.
IPV6 Dest	Indicates IPv6 destination address and mask.
IntCost	IPv4 internal cost, the cost of an IS-IS route.
ExtCost	IPv4 external cost, the cost of other protocol route imported by IS-IS. NOTE: The costs of non-IS-IS routes imported by the import-route cost-type external command are displayed in this field so that the costs of non-IS-IS routes are kept independently from the costs of IS-IS routes.
Cost	Indicates IPv6 destination cost.
ExitInterface	Indicates the outbound interface.
NextHop	Indicates the next hop for the route.
Flags	Indicates route flags.
D	Indicates direct routes.
A	Indicates that the route is added to the unicast routing table.
L	Indicates that the route is advertised through a Label Switch Path (LSP).
S	Indicates that IGP-Shortcut exists on the path to the prefix.
U	Indicates Up/Down bit.

# Display the IPv4 routes of IS-IS.

<sysname> display isis route ipv4

                         Route information for ISIS(1)
                         -----------------------------
                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

 IPV4 Destination     Int.Cost   Ext.Cost ExitInterface   NextHop         Flags
--------------------------------------------------------------------------------
 1.1.1.0/24           10         NULL     LoopBack1       Direct          D/-/L/-
 2.2.2.0/24           10         NULL     LoopBack2       Direct          D/-/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set


                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Destination     Int.Cost   Ext.Cost ExitInterface   NextHop         Flags
--------------------------------------------------------------------------------
 1.1.1.0/24           10         NULL     LoopBack1       Direct          D/-/L/-
 2.2.2.0/24           10         NULL     LoopBack2       Direct          D/-/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set

# Display the IPv6 routes of IS-IS.

<sysname> display isis route ipv6

                         Route information for ISIS(1)
                         -----------------------------
                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

IPV6 Destination   IntCost   ExtCost   ExitInterface        NextHop                  Flags
-------------------------------------------------------------------------------------------
 2001:db8::/64     10        NULL      GE0/0/0              Direct                   D/L/-
 2001:db8::/64     20        NULL      GE0/0/0              FE80::200:5EFF:FE04:4A01 A/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set


                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

IPV6 Destination   IntCost   ExtCost   ExitInterface        NextHop                  Flags
------------------------------------------------------------------------------------------
 2001:db8::/64     10        NULL      GE0/0/0              Direct                   D/L/-
 2001:db8::/64     20        NULL      GE0/0/0              FE80::200:5EFF:FE04:4A01 A/L/-

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set

# Display detailed information of IS-IS routes.

<sysname> display isis route verbose

                         Route information for ISIS(1)
                         -----------------------------

                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/-/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/0/0                   0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/-/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/0/10                   0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/-/L/-
 Priority   : Low
 NextHop    :                    Interface :               ExitIndex :
    20.0.0.2                           GE0/0/10    GE0/0/0                   0x00000005

 IPV4 Dest  : 1.1.1.1/32         Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/L/-
 Priority   : Medium
 NextHop    :                    Interface :               ExitIndex :
    10.0.0.2                           GE0/0/0                   0x00000005
 (B)20.0.0.2                           GE0/0/10                   0x00000003

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set


                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/-/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/0/0                   0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/-/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/0/10                   0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-/-
 Priority   : Low

 IPV4 Dest  : 1.1.1.1/32         Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-/-
 Priority   : Medium

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
                               U-Up/Down Bit Set

**Table 2** Description of the **display isis route verbose** command output
Item	Description
IPV4 Dest	IPv4 destination address or mask
Int.Cost	IPv4 internal cost, the cost of an IS-IS route.
Ext.Cost	IPv4 external cost, the cost of other protocol route imported by IS-IS. NOTE: The costs of non-IS-IS routes imported by the import-route cost-type external command are displayed in this field so that the costs of non-IS-IS routes are kept independently from the costs of IS-IS routes.
Src Count	Number of source addresses to the same destination
Admin Tag	Administrative tag of the route
Priority	Convergence priority of IS-IS route: Critical High Medium Low
Interface	Outbound interface
NextHop	Next hop of the route
Flags	Flags of routing information
IPv6 Dest	IPv6 destination address or prefix length
Cost	IPv6 destination cost
ExitIndex	Index of the outgoing interface
(B)	The route marked as the backup route